US3906628A - Tool for splitting nuts - Google Patents

Tool for splitting nuts Download PDF

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Publication number
US3906628A
US3906628A US499862A US49986274A US3906628A US 3906628 A US3906628 A US 3906628A US 499862 A US499862 A US 499862A US 49986274 A US49986274 A US 49986274A US 3906628 A US3906628 A US 3906628A
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Prior art keywords
nut
tool
frame
anvil
plunger
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Expired - Lifetime
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US499862A
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Basil Joseph Hastings
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T Williams Drop Forgings and Tools Ltd
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T Williams Drop Forgings and Tools Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
    • B25B27/18—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same withdrawing broken threaded parts or twist drills

Definitions

  • ABSTRACT In a tool for splitting nuts an apertured frame to receive a nut incorporates an anvil against which the nut is forced by a chisel head on a plunger actuated by a bolt in screw-threaded engagement with the frame, and the cutting edge of the chisel is inclined in such a direction relative to the axis of the nut that the cutting edge first engages the nut at or adjacent to its base.
  • This invention relates to a new or improved tool for splitting nuts in mechanical assemblies In servicing or dismantling machines, vehicles, and other assemblies of parts secured together by nuts on bolts or studs it is sometimes found that nuts, through corrosion or deformation or any other reason, have become so bound to their bolts or studs that they cannot be removed with a spanner or similar tool normally used for the purpose.
  • a tool for splitting a nut comprises a rigid frame having an opening to fit over the nut, and at one end of the opening there is an anvil and at the other end there is a plunger with a chisel head which is adapted to be advanced by screw means towards the anvil.
  • the cutting edge of the chisel head lies in a plane containing the axis of the nut when the tool is in position and is inclined at a small angle to that axis in such a direction that the cutting edge first engages the nut at or adjacent to its base.
  • the frame is fitted over the nut with the plunger retracted; and then the plunger is advanced by the screw means, to grip the nut between the anvil and the chisel end of the plunger.
  • the screw means On continued operation of the screw means the chisel end is forced into the not to split it longitudinally and allow it to be removed.
  • FIG. 1 is a side elevation of the tool
  • FIG. 2 is a plan.
  • the frame 1 is a steel forging to provide adequate strength. At one end it has a rectangular opening 2 of a width sufficient to accommodate the largest nut to be dealt with. At the other end there is an axial extension 3 of substantial length which is bored longitudinally. The outer end of the bore is screw-threaded internally to receive a screwed bolt 4. The inner end of the bore is unthreaded, and slidably mounted in it is a plunger 5 having a chisel end 6 extending into the opening. The cutting edge of the chisel end is inclined at a small angle to a line at right angles to the axis of the plunger.
  • a ball 7 is located in the bore between the adjacent ends of the bolt 4 and the plunger 5 to transmit the axial thrust of the bolt to the chisel.
  • An anvil 11 is located at the opposite end of the opening in alignment with the plunger and is conveniently formed as a separate member having a shank 8 which is received in an opening in the end of the frame remote from the extension 3 and an enlarged head 9 for engagement with a nut.
  • the head may be slightly dished as indicated at 12 and formed with a sharp edge 13 to bite into the surface of the nut.
  • the shank may be rivetted or peened or otherwise secured in the opening in the frame or it may be loose and interchangeable.
  • the axis of the chisel-headed plunger 5 is offset downwardly from the median horizontal plane of the frame so that with the cutting edge of the chisel vertical its lower end extends slightly below the bottom of the fram'"and can engage the nut at or adjacent to its lower end.
  • the chisel-headed plunger is conveniently formed from high quality steel and may be hardened.
  • the length of the plunger is preferably such that when the tool is not in use the chisel end will strike the anvil before the inner end of the plunger comes out of the bore in the frame so that the plunger cannot drop out and be lost.
  • the ball may be omitted, the inner end of the bolt 4 then bearing directly on the plunger 5.
  • a tool for splitting nuts comprising a rigid frame having an opening to receive a nut, an anvil at one end of the opening, and at the other end a plunger with a chisel head movable by screw means towards the anvil, wherein the cutting edge of the chisel head lies in a plane containing the axis of a nut when the tool is in position over the nut and is inclined at a small angle to that axis in such a direction that the cutting edge first engages the nut at or adjacent to its base.
  • anvil is a separate member having a shank located in an opening in the end of the frame, the shank terminating in an enlarged head which is dished and formed with a sharp edge to bite into the surface of the nut.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)

Abstract

In a tool for splitting nuts an apertured frame to receive a nut incorporates an anvil against which the nut is forced by a chisel head on a plunger actuated by a bolt in screw-threaded engagement with the frame, and the cutting edge of the chisel is inclined in such a direction relative to the axis of the nut that the cutting edge first engages the nut at or adjacent to its base.

Description

United States Patent 1191 Hastings 1451 Sept. 23, 1975 TOOL FOR SPLITTING NUTS [75] Inventor: Basil Joseph Hastings, Birmingham,
England [73] Assignee: T. Williams (Drop Forging & Tools) Limited, Birmingham, England 22 Filed: Aug. 22, 1974 21 App1.No.: 499,862
[30] Foreign Application Priority Data Aug. 23, 1973 United Kingdom 39952/73 [52] US. Cl. 30/182 [51] Int. Cl. B26B 17/00 [58] Field of Search 30/182, 183, 184, 185, 30/180, 272 R [56] References Cited UNITED STATES PATENTS 1,156,745 10 1915 Brady 30/132 x 1,361,798 12/1920 Pedersen .1 30/272 R 1,613,359 1/1927 Peters 1 30/185 2,879.592 3/1959 Paul 1 1 30/272 R 2,985,960 5/1961 Hill 30/272 R FOREIGN PATENTS OR APPLICATIONS 52,010 /1966 Poland 30/182 Primary Examiner-A1 Lawrence Smith Assistant ExaminerJ. C. Peters Attorney, Agent, or FirmScrivener Parker Scrivener and Clarke [57] ABSTRACT In a tool for splitting nuts an apertured frame to receive a nut incorporates an anvil against which the nut is forced by a chisel head on a plunger actuated by a bolt in screw-threaded engagement with the frame, and the cutting edge of the chisel is inclined in such a direction relative to the axis of the nut that the cutting edge first engages the nut at or adjacent to its base.
3 Claims, 2 Drawing Figures TOOL FOR SPLITTING NUTS This invention relates to a new or improved tool for splitting nuts in mechanical assemblies In servicing or dismantling machines, vehicles, and other assemblies of parts secured together by nuts on bolts or studs it is sometimes found that nuts, through corrosion or deformation or any other reason, have become so bound to their bolts or studs that they cannot be removed with a spanner or similar tool normally used for the purpose.
If a nut has to be removed this can be done with a hammer and chisel but that is a laborious process and is liable to cause damage to adjacent parts of the assembly, and various forms of tool for splitting nuts have been proposed. 7
According to our invention a tool for splitting a nut comprises a rigid frame having an opening to fit over the nut, and at one end of the opening there is an anvil and at the other end there is a plunger with a chisel head which is adapted to be advanced by screw means towards the anvil. The cutting edge of the chisel head lies in a plane containing the axis of the nut when the tool is in position and is inclined at a small angle to that axis in such a direction that the cutting edge first engages the nut at or adjacent to its base.
To use the tool the frame is fitted over the nut with the plunger retracted; and then the plunger is advanced by the screw means, to grip the nut between the anvil and the chisel end of the plunger. On continued operation of the screw means the chisel end is forced into the not to split it longitudinally and allow it to be removed.
One form of our improved tool is illustrated by way of example in the accompanying drawings in which:
FIG. 1 is a side elevation of the tool, and
FIG. 2 is a plan.
In the tool illustrated the frame 1 is a steel forging to provide adequate strength. At one end it has a rectangular opening 2 of a width sufficient to accommodate the largest nut to be dealt with. At the other end there is an axial extension 3 of substantial length which is bored longitudinally. The outer end of the bore is screw-threaded internally to receive a screwed bolt 4. The inner end of the bore is unthreaded, and slidably mounted in it is a plunger 5 having a chisel end 6 extending into the opening. The cutting edge of the chisel end is inclined at a small angle to a line at right angles to the axis of the plunger.
A ball 7 is located in the bore between the adjacent ends of the bolt 4 and the plunger 5 to transmit the axial thrust of the bolt to the chisel.
An anvil 11 is located at the opposite end of the opening in alignment with the plunger and is conveniently formed as a separate member having a shank 8 which is received in an opening in the end of the frame remote from the extension 3 and an enlarged head 9 for engagement with a nut. The head may be slightly dished as indicated at 12 and formed with a sharp edge 13 to bite into the surface of the nut. The shank may be rivetted or peened or otherwise secured in the opening in the frame or it may be loose and interchangeable.
Considering the frame in a horizontal position as shown in FIG. 1 for engagement with a nut 10 on a bolt or stud of which the axis is vertical, the axis of the chisel-headed plunger 5 is offset downwardly from the median horizontal plane of the frame so that with the cutting edge of the chisel vertical its lower end extends slightly below the bottom of the fram'"and can engage the nut at or adjacent to its lower end.
In the operation of splitting a nut the inclination of the edge of the chisel tends to urge it downwardly as it is forced into the nut and the chisel does not ride upwardly on the nut.
The chisel-headed plunger is conveniently formed from high quality steel and may be hardened.
The length of the plunger is preferably such that when the tool is not in use the chisel end will strike the anvil before the inner end of the plunger comes out of the bore in the frame so that the plunger cannot drop out and be lost.
In a modification the ball may be omitted, the inner end of the bolt 4 then bearing directly on the plunger 5.
I claim:
1. A tool for splitting nuts comprising a rigid frame having an opening to receive a nut, an anvil at one end of the opening, and at the other end a plunger with a chisel head movable by screw means towards the anvil, wherein the cutting edge of the chisel head lies in a plane containing the axis of a nut when the tool is in position over the nut and is inclined at a small angle to that axis in such a direction that the cutting edge first engages the nut at or adjacent to its base.
2. A tool as in claim 1 wherein the plunger is axially movable in a bore in an extension of the frame at the opposite end from the anvil and is advanced towards the anvil by a bolt in screw-threaded engagement with the bore, and the axis of the plunger is offset downwardly from the median horizontal plane of the frame so that with the cutting edge of the chisel head vertical its lower end extends below the bottom surface of the frame.
3. A tool as in claim 1 wherein the anvil is a separate member having a shank located in an opening in the end of the frame, the shank terminating in an enlarged head which is dished and formed with a sharp edge to bite into the surface of the nut.

Claims (3)

1. A tool for splitting nuts comprising a rigid frame having an opening to receive a nut, an anvil at one end of the opening, and at the other end a plunger with a chisel head movable by screw means towards the anvil, wherein the cutting edge of the chisel head lies in a plane containing the axis of a nut when the tool is in position over the nut and is inclined at a small angle to that axis in such a direction that the cutting edge first engages the nut at or adjacent to its base.
2. A tool as in claim 1 wherein the plunger is axially movable in a bore in an extension of the frame at the opposite end from the anvil and is advanced towards the anvil by a bolt in screw-threaded engagement with the bore, and the axis of the plunger is offset downwardly from the median horizontal plane of the frame so that with the cutting edge of the chisel head vertical its lower end extends below the bottom surface of the frame.
3. A tool as in claim 1 wherein the anvil is a separate member having a shank located in an opening in the end of the frame, the shank terminating in an enlarged head which is dished and formed with a sharp edge to bite into the surface of the nut.
US499862A 1973-08-23 1974-08-22 Tool for splitting nuts Expired - Lifetime US3906628A (en)

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GB3995273A GB1415605A (en) 1973-08-23 1973-08-23 Tool for splitting nuts

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4057897A (en) * 1976-04-19 1977-11-15 Charles Mitchell Seymour Portable hydraulic tool useful for cutting nuts
US4443941A (en) * 1981-10-16 1984-04-24 Mcphaul Jack L Intramedullary pin cutting instrument
US20040118262A1 (en) * 2000-12-07 2004-06-24 Cerda Luis Oritz Device for the maintenance of semi-autogenous grinding mills used in large-scale mining
GB2481962A (en) * 2010-05-13 2012-01-18 Graham Downey Nut extractor
CN107186660A (en) * 2017-07-28 2017-09-22 中国水利水电第五工程局有限公司 Corrosion nut removes device in a kind of hydroelectric project
CN109967962A (en) * 2017-12-27 2019-07-05 核动力运行研究所 A kind of round nut breaks cutting tool and its application method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4837915A (en) * 1988-01-04 1989-06-13 James D. Welch Method of breaking bearings

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1156745A (en) * 1915-05-01 1915-10-12 Joseph D Brady Tool for splitting nuts.
US1361798A (en) * 1918-05-22 1920-12-07 C C Carter Cutting-tool
US1613359A (en) * 1925-04-23 1927-01-04 Peter J Peters Nut and bolt cutter
US2879592A (en) * 1958-07-18 1959-03-31 Mahrle F Paul Nut splitter
US2985960A (en) * 1959-06-22 1961-05-30 Craft Tool Co Nut-splitting tools

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1156745A (en) * 1915-05-01 1915-10-12 Joseph D Brady Tool for splitting nuts.
US1361798A (en) * 1918-05-22 1920-12-07 C C Carter Cutting-tool
US1613359A (en) * 1925-04-23 1927-01-04 Peter J Peters Nut and bolt cutter
US2879592A (en) * 1958-07-18 1959-03-31 Mahrle F Paul Nut splitter
US2985960A (en) * 1959-06-22 1961-05-30 Craft Tool Co Nut-splitting tools

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4057897A (en) * 1976-04-19 1977-11-15 Charles Mitchell Seymour Portable hydraulic tool useful for cutting nuts
US4443941A (en) * 1981-10-16 1984-04-24 Mcphaul Jack L Intramedullary pin cutting instrument
US20040118262A1 (en) * 2000-12-07 2004-06-24 Cerda Luis Oritz Device for the maintenance of semi-autogenous grinding mills used in large-scale mining
US6869001B2 (en) * 2000-12-07 2005-03-22 Corporacion Nacional Del Cobre De Chile Device for the maintenance of semi-autogenous grinding mills used in large-scale mining
GB2481962A (en) * 2010-05-13 2012-01-18 Graham Downey Nut extractor
CN107186660A (en) * 2017-07-28 2017-09-22 中国水利水电第五工程局有限公司 Corrosion nut removes device in a kind of hydroelectric project
CN109967962A (en) * 2017-12-27 2019-07-05 核动力运行研究所 A kind of round nut breaks cutting tool and its application method
CN109967962B (en) * 2017-12-27 2023-08-15 核动力运行研究所 Round nut breaking tool and use method thereof

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Publication number Publication date
AU7250374A (en) 1976-02-19
AU474613B2 (en) 1976-07-29
GB1415605A (en) 1975-11-26

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